Quantum-Si Q3 revenue falls to $212,000; net loss narrows to $22.3 million
Quantum-Si reported third-quarter 2026 revenue of $212,000, down from $552,000 a year earlier, as it transitions from its Platinum instrument to the Proteus platform. Net loss narrowed to $22.3 million from $35.7 million, and the company lowered its full-year 2026 guidance for adjusted operating expenses and total cash usage while keeping the Proteus launch target of the second quarter of 2027.
Key points
- Q3 2026 revenue was $212,000 versus $552,000 in Q3 2025; nine-month revenue was $814,000 versus $2.0 million.
- Q3 2026 net loss was $22.3 million versus $35.7 million a year earlier; the prior-year quarter included $13.6 million of net lease termination expense.
- Full-year 2026 guidance for adjusted total operating expenses was lowered to $87.0 million or less from $98.0 million or less; total cash usage guidance was lowered to $87.0 million or less from $93.0 million.
- Cash, cash equivalents and marketable securities were $149.4 million as of September 30, 2026; the company expects cash to fund operations into the fourth quarter of 2028.
The filing
Written by AI on Nov 9, 2026, 11:43 AM ET, from this filing only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on November 05, 2026.
Briefs are written by AI from the filing text and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the AI's reading of the filing for shareholders, not a price forecast. Not investment advice.